Merge pull request #52 in G/fastr from...

Merge pull request #52 in G/fastr from ~JEREMIE.MISEREZ_ORACLE.COM/fastr:bug/fastrcompilemethodnotfound to master

* commit 'f4dc68ea':
  Commit ff587828f2aa04feb043276dcd05d8d4a56047f7  (2016-04-05) in graal-core removed the compile() method from GraalTruffleRuntime.java, resulting in the error "FastR internal error: fastr.compile: failed to find 'compile' method" when trying to run FastR with Graal. This change uses the new submitForCompilation and finishCompilation methods. Note that finishCompilation is called so that notifyCompilationQueued is called, see e.g. similar usage in OptimizedCallTarget.java: compile().